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See detailActive vitamin B12: detection and clinical implications
VRANKEN, Laura ULg

Conference (2012, October 25)

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See detailCambios ambientales del último milenio en sedimentos lacustres del Lago Thompson, Patagonia Chilena Norte
Sacré, Vincent ULg; Fagel, Nathalie ULg; Leclercq, Louis ULg et al

Poster (2012, October 25)

Este estudio se enfoca en un análisis multiproxy de un testigo sedimentario del Lago Thompson (area 1 km2; 751 masl ; 45°38’S 72°47’W) obtenido en 2008 (LT08-E, 130 cm), con el objetivo de documentar la ... [more ▼]

Este estudio se enfoca en un análisis multiproxy de un testigo sedimentario del Lago Thompson (area 1 km2; 751 masl ; 45°38’S 72°47’W) obtenido en 2008 (LT08-E, 130 cm), con el objetivo de documentar la variabilidad climática durante el último milenio en la Patagonia Chilena Norte y su impacto sobre el ambiente. El modelo de datación se basó en cinco fechados de 14C. Los resultados de 210Pb y 137 Cs no permitieron estimar la tasa de sedimentación para la parte superficial del núcleo. El lago Thompson esta caracterizado por una pequeña cuenca de suaves pendientes y sus sedimentos están dominados por limo arcilloso y partículas amorfas (principalmente diatomeas). Esto último es sustentado por la relación atómica de carbono/nitrógeno (C/N) que indica el origen fitoplanctónico del sedimento (8-10). Los perfiles de rayos –X, susceptibilidad magnética y LOI 550ºC evidencian dos depósitos volcánicos en 1410-1440 y 1780-1790 AD. Los perfiles de C/N y sílice biogénica (SiB) sugieren una alta productividad durante un periodo equivalente a la Pequeña Edad del Hielo (1650-1850 AD), con una máxima intensidad durante ~1800 AD. Desde 1850 AD hasta la actualidad, los perfiles de LOI 550ºC y SiB evidencian una reciente eutrofización y aumento del nivel del lago (asociado con aumento de temperaturas y humedad). Además, los perfiles de SiB presentan una correlación inversa con las temperaturas reconstruidas por anillos de árboles en la Patagonia. El contenido de diatomeas es dominado por especies planctónicas (Aulacoseira sp. y Cyclotella sp.), mientras que taxa bentónicos no muestran una buena diversificación en comparación a otros lagos de la Patagonia. La abundancia de diatomeas muestra respuestas específicas a los depósitos volcánicos con una disminución de Aulacoseira sp.. La relación planctónica/bentónica permite identificar dos periodos de alto y bajo nivel del lago coincidiendo con fases húmedas y secas de la Pequeña Edad de Hielo (1200-1650 y 1650-1850 AD). La realización de análisis sedimentológicos, geoquímicos y de microfósiles permitiría una mejor caracterización de los modelos de depositación del sedimento (impregnación del núcleo sedimentario) y de la interacción entre depósitos volcánicos y diatomeas. Agradecimientos a Fondecyt Nº1070508, FNRS 1360 2007-2010 y ULg CFRA 1060 2009-2010. [less ▲]

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See detailLes équations allométriques pantropicales sont-elles valides en Afrique centrale
Fayolle, Adeline ULg; Ernst, Gaëtan; Bouissou, Christina et al

Scientific conference (2012, October 24)

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See detailAspects redistributifs du secteur de la santé en Belgique
Fecher-Bourgeois, Fabienne ULg

in D'autres Repères (2012)

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See detailOPTIMIZATION OF HUMAN ES CELLS (hESCs) CRYOPRESERVATION
Connan, Delphine ULg; Ectors, Fabien ULg; Grobet, Luc ULg et al

Poster (2012, October 22)

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See detailArt of Taste and Aesthetics of Cooking: A History
Von Hoffmann, Viktoria ULg

Conference (2012, October 20)

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See detailMagnetic shielding with YBCO coated conductors: influence of the geometry on its performances.
Wera, Laurent ULg; Fagnard, Jean-François ULg; Levin, George et al

Poster (2012, October 10)

A superconducting magnetic screen can be built as a stack of several sections of milled 2G coated conductors. Each section consists of a closed loop where persistent currents can flow and provide a strong ... [more ▼]

A superconducting magnetic screen can be built as a stack of several sections of milled 2G coated conductors. Each section consists of a closed loop where persistent currents can flow and provide a strong attenuation of external dc magnetic fields. The purpose of the present work is to study experimentally several geometries of such magnetic screens made out of YBa2Cu3O7 (YBCO) coated conductors from SuperPower. Our aim is to investigate in details the influence of the aspect ratio and the number of layers of the assembly on the magnetic shielding properties. In order to do so, the magnetic screen is subjected to an axial quasi-static (“dc”) magnetic field ramped slowly a fixed sweep rates. A Hall probe is used to measure the local magnetic induction inside the assembly as a function of the applied magnetic induction. Results show that the threshold magnetic induction (above which magnetic shielding ceases) increases with the number of layers and that the shielding factor (defined as to ratio between the applied magnetic induction and the magnetic induction measured inside the screen) is improved for increasing aspect ratios of the global coated conductor assembly. Using a double layer of 18 sections at T = 77 K, dc magnetic fields up to 56 mT can be shielded by a factor larger than 10. The experimental results are compared to theoretical predictions for a perfect (type-I) magnetic shield with the same aspect ratio. Finally, the effect of an air gap of constant width between coated conductor sections is also characterized. [less ▲]

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See detailLa valeur, un concept saussurien
Sofia, Estanislao ULg

Scientific conference (2012, October 10)

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See detailSeagrass productivity, from genes to ecosystem management - benthic incubations
Gobert, Sylvie ULg; Lepoint, G.; Richir, Jonathan ULg et al

Scientific conference (2012, October 09)

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See detailNew construction or renovation in Belgium: Setting the net and nearly zero energy building target in perspective
Attia, Shady ULg

in PassiveHouse 2012 Conference Proceedings (2012, October 05)

The recast of the European Performance of Buildings Directive (EPBD) requires all new buildings to be “nearly zero energy’ buildings (nZEB) by 2020, including existing buildings undergoing major ... [more ▼]

The recast of the European Performance of Buildings Directive (EPBD) requires all new buildings to be “nearly zero energy’ buildings (nZEB) by 2020, including existing buildings undergoing major renovations. The revised Energy Performance in Buildings Directive calls governments to meet the nearly zero energy targets by 2020. Governments must adopt and publish regulations and procedures for the other requirements mainly the cost optimal calculation by July 2012. Many elements of the EPBD recast pertain to new buildings. Unfortunately, the recast does not set targets for improving existing buildings and non-legislative measures are required to address how to achieve a greater share of renovation. Therefore, this paper aims to identify the share of the newly constructed buildings by 2020 in Belgium. The objective is to put the nearly zero energy targets in a wider perspective in relation to the existing building stock. The paper investigates some future scenarios for the national buildings stock growth rate, coupled with demographic growth by 2050. The study’s results indicate that newly constructed building will be less than 7% by 2020 and less than 15% by 2050 in Belgium. Thus by not addressing the potential for energy renovations in the building sector the EPBD is avoiding the larger problem. [less ▲]

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See detailCPB AND AORTIC SURGERY The state of the Art (From a Theoritical to a Practical Approach)
LAGNY, Marc-Gilbert ULg; BLAFFART, Francine ULg; Defraigne, Jean-Olivier ULg

Conference (2012, October 04)

Background Despite recent improvements in prevention, medical treatment [1]and endovascular aortic repair , invasive surgery associated with cardiopulmonary bypass (CPB) remains the best option of ... [more ▼]

Background Despite recent improvements in prevention, medical treatment [1]and endovascular aortic repair , invasive surgery associated with cardiopulmonary bypass (CPB) remains the best option of treatment for some patients. The aim of this study is to make a review of the specific CPB protocols associated with these invasive surgical approaches, based on our clinical experience and according to the recent literature. Up to now, these protocols are not supported by evidence based in medicine (EBM) [2] or in perfusion (EBP). Discrepancies can be observed regarding target temperature , selective cerebral protection , CPB circuit concept and arterial cannulation sites . Variables guidelines are suggested concerning regional flow , transfusion requirements [3], coagulation monitoring blood gas management[4] as for cerebral and CPB monitoring tools. Conclusions In the absence of EBM and EBP in the aortic surgery field, the short and long terms clinical outcomes of the patients elected to invasive surgery for aortic diseases must guide and substantiate our choices of techniques and of CPB protocols. [less ▲]

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See detailA hot Uranus transiting the nearby M dwarf GJ 3470. Detected with HARPS velocimetry. Captured in transit with TRAPPIST photometry
Bonfils, X.; Gillon, Michaël ULg; Udry, S. et al

in Astronomy and Astrophysics (2012), 546

We report on the discovery of GJ 3470 b, a transiting hot Uranus of mass m[SUB]p[/SUB] = 14.0 ± 1.8 M[SUB]⊕[/SUB], radius R[SUB]p[/SUB] = 4.2 ± 0.6 R[SUB]⊕[/SUB] and period P = 3.3371 ± 0.0002 day. Its ... [more ▼]

We report on the discovery of GJ 3470 b, a transiting hot Uranus of mass m[SUB]p[/SUB] = 14.0 ± 1.8 M[SUB]⊕[/SUB], radius R[SUB]p[/SUB] = 4.2 ± 0.6 R[SUB]⊕[/SUB] and period P = 3.3371 ± 0.0002 day. Its host star is a nearby (d = 25.2 ± 2.9 pc) M1.5 dwarf of mass M[SUB]⋆[/SUB] = 0.54 ± 0.07 M[SUB]&sun;[/SUB] and radius R[SUB]⋆[/SUB] = 0.50 ± 0.06 R[SUB]&sun;[/SUB]. The detection was made during a radial-velocity campaign with Harps that focused on the search for short-period planets orbiting M dwarfs. Once the planet was discovered and the transit-search window narrowed to about 10% of an orbital period, a photometric search started with Trappist and quickly detected the ingress of the planet. Additional observations with Trappist, EulerCam and Nites definitely confirmed the transiting nature of GJ 3470b and allowed the determination of its true mass and radius. The star's visible or infrared brightness (V[SUP]mag[/SUP] = 12.3, K[SUP]mag[/SUP] = 8.0), together with a large eclipse depth D = 0.57 ± 0.05%, ranks GJ 3470 b among the most suitable planets for follow-up characterizations. Based on observations made with the HARPS instrument on the ESO 3.6 m telescope under the program IDs 183.C-0437 at Cerro La Silla (Chile).Our radial-velocity and photometric time series are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/546/A27">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/546/A27</A> [less ▲]

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See detailUltraviolet Auroral Pulsations on Saturn from Cassini UVIS
Pryor, Wayne R.; Esposito, L. W.; Jouchoux, A. et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2012, October 01)

Cassini Ultraviolet Imaging Spectrograph (UVIS) observations of Saturn were obtained on 2009 days 278-280 with the UVIS long slit aligned east-west along the northern auroral oval. Bright quasi-periodic ... [more ▼]

Cassini Ultraviolet Imaging Spectrograph (UVIS) observations of Saturn were obtained on 2009 days 278-280 with the UVIS long slit aligned east-west along the northern auroral oval. Bright quasi-periodic localized bursts of UV emission were often observed with 1 hour spacing that slowly moved sub-corotationally along the main auroral arc. We will report on an apparent correlation of the bursts with the locations of Saturn's moons, and a search for other such examples. We will also compare the UVIS results with simultaneous Cassini Imaging Science Subsystem (ISS) auroral images. [less ▲]

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See detailPréparation de couches catalytiques pour PEMFC à partir de xérogels de carbone.
Deschamps, Fabien ULg; Traina, Karl; Pirard, Jean-Paul et al

Conference (2012, October 01)

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See detailPropriétés physicochimiques et électrochimiques de catalyseurs Pt/xérogel de carbone synthétisés par la méthode de SEA multiple.
Zubiaur, Anthony ULg; Chatenet, M.; Maillard, F. et al

Conference (2012, October 01)

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See detailFonctionnalisation surfacique de poudre de carbone pour greffer des nanoparticules métalliques par plasma.
Laurent-Brocq, M.; Job, Nathalie ULg; Pireaux, J.-J.

Conference (2012, October 01)

Detailed reference viewed: 15 (0 ULg)